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$Measurement of excitation spectra in the ${}^{12}$C$(p,d)$ reaction near the $\eta'$ emission threshold$

Measurement of excitation spectra in the ${}^{12}$C$(p,d)$ reaction near the $\eta'$ emission threshold

Jun 29, 2018 06/18

by Y. K. Tanaka; K. Itahashi; H. Fujioka; Y. Ayyad; J. Benlliure; K. -T. Brinkmann; S. Friedrich; H. Geissel; J. Gellanki; C. Guo; E. Gutz; E. Haettner; M. N. Harakeh; R. S. Hayano; Y. Higashi; S. Hirenzaki; C. Hornung; Y. Igarashi; N. Ikeno; M. Iwasaki; D. Jido; N. Kalantar-Nayestanaki; R. Kanungo; R. Knöbel; N. Kurz; V. Metag; I. Mukha; T. Nagae; H. Nagahiro; M. Nanova; T. Nishi; H. J. Ong; S. Pietri; A. Prochazka; C. Rappold; M. P. Reiter; J. L. Rodríguez-Sánchez; C. Scheidenberger; H. Simon; B. Sitar; P. Strmen; B. Sun; K. Suzuki; I. Szarka; M. Takechi; I. Tanihata; S. Terashima; Y. N. Watanabe; H. Weick; E. Widmann; J. S. Winfield; X. Xu; H. Yamakami; J. Zhao

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Excitation spectra of $^{11}$C were measured in the $^{12}$C$(p,d)$ reaction near the $\eta'$ emission threshold. A proton beam extracted from the synchrotron SIS-18 at GSI with an incident energy of 2.5 GeV impinged on a carbon target. The momenta of deuterons emitted at 0 degrees were precisely measured with the fragment separator FRS operated as a spectrometer. In contrast to theoretical predictions on the possible existence of deeply bound $\eta'$ mesic states in carbon nuclei, no distinct...
Topic: Nuclear Experiment
Source: http://arxiv.org/abs/1611.02948

Arxiv.org

10 10.0

$Search for {\eta}'(958)-nucleus bound states by (p,d) reaction at GSI and FAIR$

Search for {\eta}'(958)-nucleus bound states by (p,d) reaction at GSI and FAIR

Jun 26, 2018 06/18

by H. Fujioka; Y. Ayyad; J. Benlliure; K. -T. Brinkmann; S. Friedrich; H. Geissel; J. Gellanki; C. Guo; E. Gutz; E. Haettner; M. N. Harakeh; R. S. Hayano; Y. Higashi; S. Hirenzaki; C. Hornung; Y. Igarashi; N. Ikeno; K. Itahashi; M. Iwasaki; D. Jido; N. Kalantar-Nayestanaki; R. Kanungo; R. Knoebel; N. Kurz; V. Metag; I. Mukha; T. Nagae; H. Nagahiro; M. Nanova; T. Nishi; H. J. Ong; S. Pietri; A. Prochazka; C. Rappold; M. P. Reiter; J. L. Rodríguez-Sánchez; C. Scheidenberger; H. Simon; B. Sitar; P. Strmen; B. Sun; K. Suzuki; I. Szarka; M. Takechi; Y. K. Tanaka; I. Tanihata; S. Terashima; Y. N. Watanabe; H. Weick; E. Widmann; J. S. Winfield; X. Xu; H. Yamakami; J. Zhao; for the Super-FRS Collaboration

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The mass of the {\eta}' meson is theoretically expected to be reduced at finite density, which indicates the existence of {\eta}'-nucleus bound states. To investigate these states, we perform missing-mass spectroscopy for the (p, d) reaction near the {\eta}' production threshold. The overview of the experimental situation is given and the current status is discussed.
Topics: Nuclear Experiment, Nuclear Theory
Source: http://arxiv.org/abs/1501.04390

Arxiv.org

6 6.0

$Spectroscopy of $\eta'$-nucleus bound states at GSI and FAIR --- very preliminary results and future prospects ---$

Spectroscopy of $\eta'$-nucleus bound states at GSI and FAIR --- very preliminary results and future prospects ---

Jun 27, 2018 06/18

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The possible existence of \eta'-nucleus bound states has been put forward through theoretical and experimental studies. It is strongly related to the \eta' mass at finite density, which is expected to be reduced because of the interplay between the $U_A(1)$ anomaly and partial restoration of chiral symmetry. The investigation of the C(p,d) reaction at GSI and FAIR, as well as an overview of the experimental program at GSI and future plans at FAIR are discussed.
Topics: Nuclear Theory, Nuclear Experiment
Source: http://arxiv.org/abs/1503.03566

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